JP2009133112A - Door device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door device capable of suppressing vibration of the door panel in the vertical direction to a frame securely. <P>SOLUTION: An inner side plate 23 of the door panel is provided with a first damping engaging part 71 and a second damping engaging part 72 arranged vertically. In the first damping engaging part 71, a tapered damping recessed part 71a is formed by drawing in a projecting part 29 of the inner side plate 23 and an opening hole 71b is provided on a bottom face of the damping recessed part 71a. In the same way, in the second damping engaging part 72 a tapered damping recessed part 72a is formed by drawing in the projecting part 29 of the inner side plate 23 and an opening hole 72b is provided on a bottom face of the damping recessed part 72a. Since the damping recessed parts 71a, 72a can be drawn deep owing to the formation of the opening holes 71b, 72b provided on the bottom faces of the damping recessed parts 71a, 72a, it is possible to ensure a sufficient depth for insertion of a damping plunger on a frame side to the damping recessed parts 71a, 72a and obtain satisfactory effect for controlling vibration. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a door device having a vibration control structure on a door panel.

  FIG. 11 shows a hydraulic excavator 10 as a work machine, and an upper swing body 12 is turnably provided on a lower traveling body 11, and a cab 13, a work device 14, and a power device 15 such as an engine are placed on the upper swing body 12. Is installed. The power unit 15 is covered with an upper cover 16, a side door 17, and the like. The upper cover 16 and the side door 17 are attached to the airframe side frame by a hinge so as to be freely opened and closed. These side doors 17 and the like are basically fixed in a closed state to the body frame by a latch device 18.

  An anti-vibration component 19 for suppressing vertical vibration is attached to the side door 17, and as shown in FIG. 12, this anti-vibration component 19 is connected to an up-and-down vibration regulating body 19a attached to the body frame when the door is closed. By combining them, the vertical vibration when the side door 17 is closed is suppressed.

  As means for suppressing such vertical vibration, there is a means for fitting a stopper member on the side door side with a stopper receiver on the machine body side frame (see, for example, Patent Document 1).

  Furthermore, in the double cover structure (see, for example, Patent Document 2) in which the inner plate is fixed to the inner surface of the outer plate in the work machine, it is not easy to attach the stopper member as described above.

Therefore, as shown in FIG. 13, a bottomed concave portion B is press-molded in the inner plate A, and as shown in FIG. 14, a rod-like or cylinder projecting from the fuselage frame side is provided in the concave portion B. The vibration of the door panel is to be suppressed by inserting a part called a plunger C having a shape of a shape.
JP 2007-170114 A (page 5-8, FIG. 2-7) JP-A-9-228412 (page 3, FIG. 6-8)

  As shown in FIG. 13 and FIG. 14, it is difficult to mold the concave portion B having a sufficient depth by press molding the bottomed concave portion B on the inner plate A.

  That is, in the double door of the work machine, it is difficult to squeeze deeply in a plurality of steps with a plurality of dies during press molding with a mold due to the production volume and cost, and the deformation amount of the inner plate A is reduced. There is a limitation that the depth of the concave portion B into which the plunger C protruding from the body frame is inserted becomes shallow, and there is a problem that the vibration suppressing effect due to the insertion of the plunger C is small.

  In short, there is a problem that sufficient friction to suppress the vertical vibration of the door panel cannot be obtained with the plunger C on the airframe frame side, and the vertical vibration cannot be reliably suppressed.

  This invention is made in view of such a point, and it aims at providing the door apparatus which can suppress the vibration of the up-down direction of a door panel reliably with respect to a flame | frame.

  According to the first aspect of the present invention, the frame, the door panel attached to the frame by a hinge on one side so as to be opened and closed in the horizontal direction, and the other side opposite to the hinge of the door panel can be engaged and disengaged to the frame side. A latch device, a vibration damping engagement portion provided on the inner side of the other side of the door panel, a vibration suppression engagement portion provided on the frame side and detachable with the door panel opening and closing. The vibration damping engagement portion is a door device that includes a vibration damping recess drawn into a sheet metal and an opening hole provided in the bottom surface of the vibration damping recess.

  The invention described in claim 2 is such that the door panel in the door device according to claim 1 is thinner than the outer plate, which is fixed to the inner surface of the outer plate and the outer plate and forms a space between the outer plate. A thick inner plate and a foam material filled in a space between the outer plate and the inner plate are provided, and the vibration damping engagement portion is formed on the inner plate.

  According to the first aspect of the present invention, since the damping recess can be deeply drawn by providing an opening hole in the bottom surface of the damping recess that has been drawn into the sheet metal as the damping engagement portion. The insertion depth of the vibration damping body on the frame side with respect to the recess can be set large, the frictional force due to reliable engagement is maintained between the vibration damping engagement portion and the vibration damping body, and a large vibration suppressing effect is obtained, The vibration in the vertical direction of the door panel can be reliably suppressed with respect to the frame.

  According to the invention described in claim 2, the weight can be reduced by the hollow closed cross-sectional structure formed by the outer plate and the inner plate thinner than the outer plate, and the inner plate and the outer plate thicker than the inner plate. The hollow closed cross-section structure with a sufficient height formed by and can provide a low-cost, robust door panel that can secure sufficient strength against impacts from the outside. The foam material filled in between can effectively attenuate the sound generated from the door panel itself, that is, the sound attenuation effect is high, and the vibration damping engaging portion formed on the inner plate and the frame side The noise can be effectively reduced by the synergistic effect with the vibration control effect by the engagement with the vibration control body provided in the main body.

  Hereinafter, the present invention will be described in detail with reference to one embodiment shown in FIGS.

  FIG. 10 shows a hydraulic excavator 10 as a work machine. An upper swing body 12 is turnably provided on a lower traveling body 11, and a cab 13, a work device 14, and a power device 15 such as an engine are mounted on the upper swing body 12. Is installed. The power unit 15 is covered with an upper cover 16, a side door 17, and the like.

  5 to 7 show the door panel 20 of the side door 17, which is formed by pressing an outer plate 21 and a sheet metal having a thickness smaller than that of the outer plate 21 into an uneven shape. An inner plate 23 that fixes a concave portion to the outer plate 21 and forms a space 22 between the convex portion and the outer plate 21, and a foam material 24 filled in the space 22 between the outer plate 21 and the inner plate 23. It has.

  As shown in FIGS. 6 and 7, the inner plate 23 includes concave portions 27 that are formed in a concave shape and joined to the outer plate 21, and convex portions 29 that are bulged and formed with respect to these concave portions 27. ing. A latch mounting window 30 is opened in the outer plate 21 and the inner plate 23.

  The concave portion 27 is a portion that is bonded to the outer plate 21 by an adhesive. In the concave portion 27, a vertical reinforcing convex portion 31 that also serves as an adhesive reservoir is provided, and a lateral convex portion 29 is provided. Are provided with a recess 32 for reinforcement.

  As shown in FIG. 7, the peripheral portion of the outer plate 21 includes a hemming portion 33 that is hemmed so as to be folded and crushed so as to wrap around the peripheral portion of the inner plate 23.

  At least the peripheral edge portion of the inner plate 23 is bonded to the outer plate 21 with an adhesive, and the outer plate 21 and the inner plate 23 are joined and sealed with this adhesive. The adhesive is preferably a paste-type structural adhesive having viscosity and thermosetting properties.

  An internal reinforcing plate (not shown) is bonded between one side portion of the outer plate 21 and the inner plate 23, and a nut integrated with the inner reinforcing plate and a bolt screwed to the nut are combined in FIG. As shown, hinges 36, 37 located on one side of the inner plate 23 are attached.

  As shown in FIG. 3, a frame 41 on the airframe side is mounted on the upper swing body 12 of the excavator, and one side member 41 a of the frame 41 is hinged with hinges 36, 37 so that one side of the door panel 20 of the side door 17. The side part is attached so that horizontal opening and closing is possible. The door panel 20 has an upper surface bent toward the frame 41 with respect to the vertical surface portion 20a to form a folded curved surface portion 20b.

  A latch mechanism portion 43 of a latch device 42 that can engage and disengage the vertical surface portion 20a of the door panel 20 to the frame 41 side is provided on the latch mounting window portion 30 on the opposite side of the hinges 36 and 37 of the door panel 20. On the other hand, as the door panel 20 is opened and closed, a striker 44 as an engaging body of the latch device 42 is protruded from the mounting plate 44a fixed to the other side member 41b of the frame 41 so as to face the direction in which the door panel 20 contacts. A latch mechanism 43 provided on the door panel 20 side with respect to the striker 44 can be engaged and disengaged.

  As shown in FIG. 8, the striker 44 has a pair of upper and lower mounting substrate portions 45 fixed to the mounting plate 44a on the frame 41 side, and a V-shape from these mounting substrate portions 45 to the latch mechanism portion 43 side. A plurality of anti-vibration slope portions 46 as one anti-vibration engagement portion formed in a bulge shape, and a round shape that protrudes from the tip flat surface portion 47 between the anti-vibration slope portions 46 and is inserted into the latch mechanism portion 43 And a hook fitting 48 as a locking portion formed in a U shape by a cross-sectional member.

  Each mounting board portion 45 of the striker 44 is provided with elongated holes that are elongated in the vertical direction, and bolts 50 inserted into these elongated holes and nuts (not shown) screwed into the bolts 50. The striker 44 is attached to the attachment plate 44a on the frame 41 side.

  As shown in FIGS. 8 and 9, the latch mechanism portion 43 is attached to a mounting plate 51 attached to the door panel 20 by a pair of body plates 52 a and 52 b constituting the mechanism body portion 52 by bolts 53 and nuts 54, respectively. The main body plates 52a and 52b of the mechanism main body 52 are respectively formed with U-shaped latch groove portions 55 that are fitted to the hook metal fittings 48 of the striker 44, and the other side of each of the latch groove portions 55 is open on the other side. A plurality of anti-vibration restricting portions 56 as anti-vibration engaging portions are integrally formed in a V shape. These anti-vibration restricting portions 56 are formed by bending a part of the main body plates 52a and 52b located on the opening side of the latch groove portion 55 outward.

  The plurality of anti-vibration slope portions 46 of the striker 44 and the plurality of anti-vibration restriction portions 56 of the latch mechanism portion 43 are respectively arranged above and below, and the upper and lower anti-vibration restriction portions 56 are the upper and lower anti-vibration slope portions 46 of the striker 44. And the vibration of the mechanism main body 52 in the vertical direction is suppressed.

  An operation plate storage portion 57 is provided on the mounting plate 51, and an engagement release operation plate 58 is rotatably attached to the inside of the operation plate storage portion 57 by a shaft 59 as shown in FIG. It has been.

  The latch mechanism 43 includes a latch plate 61 pivotally supported between one side of the pair of body plates 52a and 52b of the mechanism body 52, and the other side of the pair of body plates 52a and 52b. There is provided a lock body 62 pivotally supported between them.

  The latch plate 61 has a receiving groove 63 for receiving the hook metal fitting 48 when the hook metal fitting 48 of the striker 44 is inserted into the latch groove 55, and an angle at which the receiving groove 63 is opened to the opening side of the latch groove 55. Further, although it is urged by the spring 64 shown in FIG. 9 and is locked by the stopper 65, the receiving groove 63 can be closed by rotating in accordance with the inserting operation of the hook metal fitting 48.

  The lock body 62 is urged by a spring 66 around the peripheral surface of the latch plate 61 to lock the latch plate 61 having an angle with the receiving groove 63 closed. The locking of the lock body 62 is released by an engagement release body 67 that is interlocked with the rotation of the operation plate 58. The disengaging operation of the disengaging body 67 is restricted by the locking device 68 installed adjacent thereto.

  The attachment plate 51 of the latch mechanism 43 is attached to the door panel 20 by a rivet 69.

  As shown in FIG. 3, a vertical surface portion 20 a on one side portion of the door panel 20 is attached to one side member 41 a of the frame 41 on the body side by hinges 36 and 37 so as to be openable and closable. On the other hand, on the vertical surface portion 20a on the other side of the door panel 20, a first vibration suppression engagement portion 71 and a second vibration suppression engagement portion 72 are provided above and below the inner plate 23.

  On the other hand, on the other side member 41b of the frame 41 on the machine body side, a first damping plunger 73 serving as a first damping body detachable from and detachable from the first damping engaging portion 71 as the door panel 20 is opened and closed. As the door panel 20 is opened and closed, a second damping engagement portion 72 and a second damping plunger 74 as a second damping member that can be freely engaged and disengaged are provided.

  The first damping plunger 73 and the second damping plunger 74 are attached via L-shaped attachment plates 75 and 76 that are arranged vertically and fixed to the middle step of the other side member 41b of the frame 41. .

  As shown in FIG. 4, the mounting plates 75 and 76 for mounting the first damping plunger 73 and the second damping plunger 74 are fixed to the other side member 41b of the frame 41 by bolts 81, and the damping is performed. The plungers 73 and 74 are attached to a screw shaft 83 that is screwed with a nut 82 fixed to the mounting plates 75 and 76, and are fastened by another nut 84 that is screwed with the screw shaft 83. The depth of insertion of the damping plungers 73 and 74 with respect to the damping engagement portions 71 and 72 can be adjusted by loosening the screw and adjusting the screwing position of the screw shaft 83.

  As shown in FIG. 1 and FIG. 2A, the first vibration damping engagement portion 71 includes a taper vibration damping concave portion 71a formed by drawing on the convex portion 29 of the inner plate 23 that is a sheet metal. And an opening hole 71b provided in the bottom surface of the damping recess 71a. Similarly, the second damping engagement portion 72 includes a tapered damping recess 72a formed by drawing on the projection 29 of the inner plate 23, and an opening hole provided in the bottom surface of the damping recess 72a. 72b.

  Each of the opening holes 71b and 72b is bonded to the back surface of the outer plate 21, and a sealing material such as an adhesive is applied along the bonding portion to close each of the opening holes 71b and 72b. Prevents rainwater from entering the door panel from 72b.

  Next, the function and effect of this embodiment will be described.

  As shown in FIG. 3, when the door panel 20 of the side door 17 attached to the frame 41 on one side of the airframe by the hinges 36, 37 is closed toward the frame 41 on the other side of the airframe. 8, the latch mechanism portion 43 of the door panel 20 moves toward the striker 44 on the frame 41 side, and the hook metal fitting 48 of the striker 44 is inserted into the latch groove portion 55 provided in the mechanism main body portion 52. Inserted relatively.

  At this time, the receiving groove 63 of the latch plate 61 is pressed by the hook metal fitting 48 of the striker 44, and the latch plate 61 rotates to restrain and lock the hook metal fitting 48 of the striker 44.

  At this time, the upper and lower anti-vibration regulating portions 56 provided integrally with the mechanism main body portion 52 of the latch mechanism portion 43 and the upper and lower anti-vibration slope portions 46 provided integrally with the striker 44 are engaged with each other, and the side door is engaged. The 17 door panels 20 are regulated so as not to cause vertical vibrations.

  At the same time, as shown in FIG. 2 (a), on the frame 41 side on the fuselage side with respect to the damping recesses 71a and 72a of the damping engagement portions 71 and 72 provided on the vertical surface portion 20a of the door panel 20. The provided damping plungers 73 and 74 are inserted.

  On the other hand, in the contrast technique that is difficult to squeeze deeply as shown in FIG. 2 (b), the deformation amount of the inner plate A is limited, and the concave portion B that fits the plunger C protruding from the frame on the machine body side is provided. The depth becomes shallow, and the vibration suppressing effect due to the insertion of the plunger C is small.

  Thus, by providing the opening holes 71b and 72b on the bottom surfaces of the vibration-damping recesses 71a and 72a drawn into the sheet metal as the vibration-damping engaging portions 71 and 72, the vibration-damping recesses 71a and 72a can be deeply drawn. The insertion depth of the vibration-suppressing plungers 73 and 74 on the frame side with respect to the vibration-suppressing recesses 71a and 72a can be set large, and the engagement between the vibration-suppressing engaging portions 71 and 72 and the vibration-suppressing plungers 73 and 74 is ensured. Thus, a large vibration suppressing effect is obtained, and the vertical vibration of the door panel 20 relative to the frame 41 on the airframe side can be reliably suppressed.

  In particular, the vertical vibration suppression action by the engagement of the upper and lower anti-vibration restricting portion 56 provided in the mechanism main body 52 of the latch mechanism portion 43 and the upper and lower anti-vibration slope portion 46 provided in the striker 44, and The vibration control recesses 71a and 72a of the vibration suppression engagement portions 71 and 72 and the vertical vibration control action by the engagement of the vibration control plungers 73 and 74 act synergistically to obtain a large vertical vibration control effect. It is done.

  Further, the hollow closed cross-section structure formed by the outer plate 21 and the inner plate 23 thinner than the outer plate 21 can reduce the weight, and the inner plate 23 and the thicker outer plate 21 are formed. A hollow closed cross-section structure with a sufficient height can provide a robust door panel 20 that can secure sufficient strength against an impact from the outside at a low cost, and further, between the outer plate 21 and the inner plate 23. The filled foam material 24 can effectively attenuate the sound generated from the door panel 20 itself, that is, the sound damping effect is high, and the damping engagement portions 71 and 72 formed on the inner plate 23 are also provided. The noise can be effectively reduced by a synergistic effect with the vibration control effect by the engagement with the vibration control plungers 73 and 74 provided on the frame 41 on the machine body side.

  The present invention can be used for a side door and a rear door of a working machine such as a hydraulic excavator.

It is sectional drawing which shows one Embodiment of the inner side board used for the door apparatus which concerns on this invention. (A) is sectional drawing which shows the door panel vibration damping engagement state of a door apparatus same as the above, (b) is sectional drawing which shows the comparative example used as the premise. It is a perspective view which shows the example of attachment of a door apparatus same as the above. It is the side view which notched a part of door apparatus same as the above. It is a perspective view of the outer surface side which shows the door panel of a door apparatus same as the above. It is an internal view which shows the door panel of a door apparatus same as the above. It is sectional drawing to which some door panels of the door apparatus same as the above were expanded. It is a perspective view of the latch apparatus provided in the door apparatus same as the above. It is a perspective view which shows the latch mechanism part of a latch apparatus same as the above. It is a top view of the working machine provided with the door device same as the above. It is a perspective view of the working machine provided with the conventional door apparatus. It is a perspective view of the vertical vibration suppression means attached to the conventional working machine. It is sectional drawing of the inner side board provided with the vertical vibration suppression means used as the premise of this invention. It is sectional drawing which shows the vibration suppression engagement state by a suppression means same as the above.

Explanation of symbols

20 Door panel
21 Outer plate
22 space
23 Inner plate
24 Foam
36, 37 Hinge
41 frames
42 Latch device
71, 72 Damping engagement part
71a, 72a Damping recess
71b, 72b Opening hole
73, 74 Damping plunger as damping body

Claims (2)

Frame,
A door panel attached to the frame by a hinge on one side so that it can be opened and closed in the horizontal direction;
A latch device capable of engaging and disengaging the other side of the door panel opposite to the hinge on the frame side;
A damping engagement portion provided on the inner side at the other side of the door panel;
Provided on the frame side with a vibration damping engagement portion and a detachable vibration damping body as the door panel opens and closes,
The damping engagement part
A vibration-damping recess that has been drawn into sheet metal,
A door device comprising an opening hole provided in a bottom surface of the vibration control recess. Door panel
An outer plate,
An inner plate that is fixed to the inner surface of the outer plate and that is thinner than the outer plate forming a space between the outer plate and the outer plate;
A foam filled in the space between the outer plate and the inner plate;
The door device according to claim 1, wherein the vibration suppression engagement portion is formed on the inner plate.

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